Protected metal article and process of making same



v I H. H. ROBERTSON. 'PROTECTED METALAB'TICLE AND PROCESS OF MAKING SAME. nrucmbu mw JUNE 3.19m.

1 ,1 95,090. I Patented Aug. 15, 1916.

UNITED STATES PATENT OFFICE,

mom), :H. ROBERTSON, or SEWICKLEY, PENNSYLVANIA, ASSIGNOR 'ro nsnns'ros- PROTECTED METALCOMPANY, OF PITTSBURGH, 'PENNSYLVANIA, COBPOBATION or PENNSYLVANIA.

PROTECTED METAL ARTICLE AND PROCESS OF MAKING SAME.

Specification of Letters Patent.

Patented Aug. 15, 1916.

Application filed June .3, 1916. Serial No. 1Q1,63.'

To all whom it may concern:

Be it known that I, HAROLD H. RoBnR'r- SON, a subject of the King of Great Britain, and a resident of Sewickley, in the county of Allegheny and State of Pennsylvania, have invented an Improvement in Protected Metal Articles and Processes of Making Same, of which the following description, in connection with the accompanying drawings, is a-specification, like characters on the drawings representing like parts.

' This invention relates to a protected metal article and 'to the process of Lmakmg the same, and particularly to a metal .article having a covering or layer of fibrous mate-V with a'coating-"or layer of a material capable of resisting. a relatively high temperature, which material will be hereinafter re-- ferred to as a lacquer, and the laquered metal sheet is then dried by subjecting it to heat to set or bake the coating, after which it is passed through a bath of protective-mate-- rial, such as asphalt, which does not have a detrimental efiect on the coating oflacquer but unites therewith toeifectively secure the asphalt layerto the metal article.

The metal article thus protected may be further protected by layers of fibrous ma terial, such as asbestos, felt and-the like,

which may be saturated with asphalt or like material, or which may not be saturated, and which may be given a surface coating or layer to incase the fibrous material within it. These and other features of this invention will be pointed out in the claims at the end of this specification.

. Figure 1 is a plan view with parts broken away of a protected metal sheet embodying the invention, and Fig. 2, a. section on the.

line 2-2, Fig. 1.

Referring to Fig. 1, (1 represents a metal sheet, preferably of iron or steel, which is provided on its opposite surfaces and edges with a coating or layer 1) of. lacquer capable of resisting a relatively high temperature.

The metal sheet (1 provided with the coat-- ing or layer 6 of lacquer is subjected to heat to dry and set the lacquer, and is then passed through a bath of asphalt or like ceme htitious material to provide the'metal sheet with a coating or layer a of asphalt or the like, which adheres firmlytothe layer 6 of lacquer and is thereby firmly secured to the metal sheet a.

It is preferred to; use as the foundation coating a lacquer which is more or less reslstant to acids and alkalis, proof against moisture, flexible, and capable of resisting a relatively high temperature.

I have found that a lacquer composed of a vegetable oil, a thinning material' and a b tuminous or coal tar product,- such, for

instance, as linseed oil, benzol' and Gilsonite or a coal tar resin, vegetable oilandturpentine, is suitable for'my purpose, and while it may be preferred to use either. of the particular lacquers described, it is not desired to limit the invention in this respect, as any lacquer having the characteristics above noted, may-be used. 7,

- metal sheet protected as above de-. scribed, may be used without further pro-r tection; but for certain purposes, as, for

instance, when used as the roofing'and 'siding -of buildings, it is preferred to provide additional protection, and for this purpose the protected metal sheet'may have secured to it layers def-asbestos, paper, felt or other ,fi-brous material, which may be .saturated with asphalt of a relatively low melting point,marked e inFig, 1, or which may not be saturated but left in their natural condition. v

The non-saturated fibrous layers d are adhesively secured to the metal sheet a by the layer 0 of asphalt and the saturated layers-by the layer 0 assisted by the saturat ing asphalt e, which unites with the layer 0. When the asbestos or other fibrous layers 05 are saturated with asphalt or the like of relatively low melting point, themetal sheet may be further protected by a surface layer f of asphalt having a relatively high melting point, which unites with '"thesaturating material of the fibrous layers and seals the volatile constituents of the saturating material, thereby retaining the latter in its effective condition to protect the primary asphalt layer and the lacquer from the detrimental action of climatic changes, fumes, gases, etc., and also as an enveloping binder forthe fibrous layers, and, as a result, the metal sheet is thoroughly protected against extraneous influences for a substantially long time. A lacquer capable of resisting a substantially high temperature,'is especially advantageous as it is capable of being baked or heated in a suitable oven in a substantially short time and permits the lacquered sheets to be stacked or piled up without danger of sticking to one another, and further is capable of being passed through a bath of asphalt, and effectively unites the asphalt to the iron or steel sheet or other metal article, inasmuch as the adhesion of the lacquer to the 'metal is superior to that of the asphalt to the metal, and the adhesion of the asphalt to the lacquer is superior to'that of the asphalt to-the metal,

and further the lacquer is also'a resistant to acid and alkali fumes and gases and tomoisture and is of increased flexibility, which latter allows the metal sheet to be bent more or less without exposing the metal. In other Words, a superior protection for the metal sheet against corrosion is obtained by means of the coatings or layers of lacquer and asphalt, and a superior adhesion of the asphalt with the metal sheet is obtained, consequently when the said sheet is provided with protective layers of asbestos, felt or paper and like fibrous material, a superior bonding or adhesion of the fibrous layers to the metal sheet or article is obtained, with the result that a more durable and commercial article is produced.

I claim:

1. An improved article of manufacture comprising a metal article provided with a coating of lacquer applied to the metal article, and a coating or layer of asphalt applied to the coating of lacquer.

2. An improved article of manufacture, comprising a metal article provided with a coating of lacquer capable of resisting a relatively high temperature, and a coating of asphalt applied to the coating of lacquer.

3. An improved article of manufactui comprising a metal article provided with coating of lacquer applied to the metal art cle, a coating or layer of asphalt applie 'to the coating of lacquer, and a protectii layer of fibrous material affixed to the sai asphalt coating.

4. An improved article of manufactui comprising a metal article provided with coating of lacquer applied to the metal art cle, a coating or layer of asphalt applie to the coating of lacquer, and a protectii layer of fibrous material saturated wit asphalt and affixed to said asphalt coating.

5. An improved article of manufactui comprising a metal article provided with coating of lacquer applied to the metal art cle, a coating 'or layer of asphalt ap )lie to the coating of lacquer, a protective lay of fibrous material saturated with aspha and aiiixed to said asphalt coating, and surface coating applied to the external su: face of the saturated fibrous layers to se: the volatile constituents of the saturatin material of said fibrous layers and to bin the fibrous layers to the metal article.

6. The method of protecting metal art cl'es, which consists in cleaning the same, a] plying to thecleaned metal article a coatir of lacquer, subjecting the lacquered artic to heat to dry the same, and applying-to tl lacquered article a coating of asphalt.

7. The method of'protecting metal art cles, whichconsists in cleaning the same, a plying t6 the cleaned metal article a coatir of lacquer, subjecting the lacquered artic to heat to dry the same, and passing tl lacquered article through a bath of asphal 8. The method of protecting metal art cles, which consists in cleaning 'the sam applying to the cleaned metal article a coa ing of lacquer, subjecting the lacquered art cle to heat to dry the same, passing tl lacquered article through a bath of aspha] and applying a fibrous material to tl asphalt coated article.

In testimony whereof, I have signed m name to this specification.

HAROLD H. ROBERTSON.

Correction in Letters Patent No. 1,195,090.

It is hereby certified that in Letters Patent No. 1,195,090, granted August 15,

1916, upon the application of Harold H. Robertson, of Sewickley, Pennsylvania,

- for an improvement in Protected Metal Articles and Processes of Making Same,

an error appears in the printed specification requiring correction as follows: Page 1, line 25, for the word fpickingflread pickling; and that-the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiic'e. I v

Signed and seeled this 24th day of October, A. D., 1916.

F. W. H. CLAY,

[SEAL] Acting Commissioner of Patents 

